The Fldigi development seems to have stalled with no commits or other changes being made since January 2019. I think that, if the current upstream is not active anymore, it could be a good idea to consider making a fork of this project to continue further development and implement new features (including things like AppImage support or new digital modes). Unfortunately, I don't have enough free time to afford making and maintaining this fork myself.
The Fldigi development seems to have stalled with no commits or other changes being made since January 2019. I think that, if the current upstream is not active anymore, it could be a good idea to consider making a fork of this project to continue further development and implement new features (including things like AppImage support or new digital modes). Unfortunately, I don't have enough free time to afford making and maintaining this fork myself.